Theme 04: Soil Fertility and Plant Nutrition
Description
The contents and the extraction of mineral nutrients were determined in a coastcross pasture established on a dark red latosol (Hapludox), in São Carlos, SP, Brazil, under tropical altitude climate, receiving five rates of urea and ammonium nitrate, applied on surface. There were differences (P< 0.05) among sources and rates of N. Nutrients extraction increased with the nitrogen levels. Especially high were total N (319 and 446 kg ha-1) and K (341 and 467 kg ha-1) extractions. When forage yield was high (treatment with 500 kg of N ha-1) and for both fertilizers, macronutrients extraction was greater for K and N, followed by Ca, S, P and Mg. Micronutrients extraction occurred in the following decreasing order: Fe, Mn, Zn and Cu.
Citation
Primavesi, A. C.; Primavesi, O.; de A. Corrêa, L.; Cantarella, H.; da Silva, A. G.; and Freitas, A. R., "Effect of Sources and Rates of Nitrogen on Nutrients Extraction in Coastcross Pastures" (2021). IGC Proceedings (1993-2023). 24.
https://uknowledge.uky.edu/igc/19/4/24
Included in
Effect of Sources and Rates of Nitrogen on Nutrients Extraction in Coastcross Pastures
The contents and the extraction of mineral nutrients were determined in a coastcross pasture established on a dark red latosol (Hapludox), in São Carlos, SP, Brazil, under tropical altitude climate, receiving five rates of urea and ammonium nitrate, applied on surface. There were differences (P< 0.05) among sources and rates of N. Nutrients extraction increased with the nitrogen levels. Especially high were total N (319 and 446 kg ha-1) and K (341 and 467 kg ha-1) extractions. When forage yield was high (treatment with 500 kg of N ha-1) and for both fertilizers, macronutrients extraction was greater for K and N, followed by Ca, S, P and Mg. Micronutrients extraction occurred in the following decreasing order: Fe, Mn, Zn and Cu.
